<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input v-model="newTodoText"
            v-on:keyup.enter="addNewTodo"
            placeholder="Add a todo"
        >
        <ul>
            <li is="todo-item"
                v-for="(todo, index) in todos"
                v-bind:title="todo"
                v-on:remove="todos.splice(index, 1)"
            ></li>
        </ul>
    </div>
    <script src="../js/vue.js" charset="utf-8"></script>
    <script type="text/javascript">
        Vue.component('todo-item', {
            template: '<li> {{title}} <button v-on:click="$emit(\'remove\')">X</button></li>',
            props: ['title']
        })

        var vm = new Vue({
            el: '#app',
            data: {
                newTodoText: '',
                todos: [
                    'Do the dishes',
                    'Take out the trash',
                    'Mow the lawn'
                ]
            },
            methods: {
                addNewTodo: function () {
                    this.todos.push(this.newTodoText);
                    this.newTodoText = ''
                }
            }
        })
    </script>
</body>
</html>
